Abstract: In order to determine the appropriate amount of wheat straw returning, a field experiment was conducted to study different amount of straw returning treatment influence on soil physical and chemical properties and yield in the following season wheat fields. The results indicated that, straws increased soil moisture, the impact of humidity above the surface layer (60 cm) was the biggest. Meanwhile, straw mulch increased the soil organic matter, total nitrogen, available nitrogen, available phosphorus content .With the amount of coverage increasing the magnitude increased, straw mulch decreased the soil bulk density, increased the porosity, and better protect the soil physical structure. There was no significant difference among the treatments straw amount of 7500 kg/hm² and 6000 kg/hm² synergistic effect on soil. Straw mulch treatment increased wheat yield and factors of yield components, yield increased with straw amount increasing in different magnitude, the highest yield was 6000 kg/hm² treatment. Based on the results in this experimental condition, 6000 kg/hm² was the appropriate amount of wheat straw cover.